JDK-8006529.js revision 81:abea4ba28901 
1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/**
25 * JDK-8006529 : Methods should not always get callee parameter, and they
26 * should not be too eager in creation of scopes.
27 *
28 * @test
29 * @run
30 */
31
32/*
33 * This test script depends on nashorn Compiler internals. It uses reflection
34 * to get access to private field and many public methods of Compiler and
35 * FunctionNode classes. Note that this is trusted code and access to such
36 * internal package classes and methods is okay. But, if you modify any
37 * Compiler or FunctionNode class, you may have to revisit this script.
38 * We cannot use direct Java class (via dynalink bean linker) to Compiler
39 * and FunctionNode because of package-access check and so reflective calls.
40 */
41
42var Compiler       = Java.type("jdk.nashorn.internal.codegen.Compiler")
43var Context        = Java.type("jdk.nashorn.internal.runtime.Context")
44var Source         = Java.type("jdk.nashorn.internal.runtime.Source")
45var FunctionNode   = Java.type("jdk.nashorn.internal.ir.FunctionNode")
46
47// Compiler class methods and fields
48
49// Compiler.compile(Source, Context)
50var compilerMethod = Compiler.class.getMethod("compiler", Source.class, Context.class);
51// Compiler.compile()
52var compileMethod  = Compiler.class.getMethod("compile");
53
54// NOTE: private field. But this is a trusted test!
55// Compiler.functionNode
56var functionNodeField = Compiler.class.getDeclaredField("functionNode");
57functionNodeField.setAccessible(true);
58
59// FunctionNode methods
60
61// FunctionNode.getFunctions method
62var getFunctionsMethod = FunctionNode.class.getMethod("getFunctions");
63
64// These are method names of methods in FunctionNode class
65var allAssertionList = ['isVarArg', 'needsParentScope', 'needsCallee', 'needsScope', 'needsSelfSymbol', 'isSplit', 'hasEval', 'hasWith', 'hasDeepWithOrEval', 'varsInScope', 'isStrictMode']
66
67// corresponding Method objects of FunctionNode class
68var functionNodeMethods = {};
69// initialize FunctionNode methods
70(function() {
71    for (var f in allAssertionList) {
72        var method = allAssertionList[f];
73        functionNodeMethods[method] = FunctionNode.class.getMethod(method);
74    }
75})();
76
77// returns "script" functionNode from Compiler instance
78function getScriptNode(compiler) {
79    // compiler.functionNode
80    return functionNodeField.get(compiler);
81}
82
83// returns functionNode.getFunctions().get(0)
84function getFirstFunction(functionNode) {
85    // functionNode.getFunctions().get(0)
86    return getFunctionsMethod.invoke(functionNode).get(0);
87}
88
89// compile(script) -- compiles a script specified as a string with its
90// source code, returns a jdk.nashorn.internal.ir.FunctionNode object
91// representing it.
92function compile(source) {
93   var compiler = compilerMethod.invoke(null,
94       new Source("<no name>", source), Context.getContext())
95   compileMethod.invoke(compiler);
96   return getScriptNode(compiler)
97};
98
99var allAssertions = (function() {
100    var allAssertions = {}
101    for(var assertion in allAssertionList) {
102        allAssertions[allAssertionList[assertion]] = true
103    }
104    return allAssertions;
105})();
106
107
108// test(f[, assertions...]) tests whether all the specified assertions on the
109// passed function node are true.
110function test(f) {
111    var assertions = {}
112    for(var i = 1; i < arguments.length; ++i) {
113        var assertion = arguments[i]
114        if(!allAssertions[assertion]) {
115            throw "Unknown assertion " + assertion + " for " + f;
116        }
117        assertions[assertion] = true
118    }
119    for(var assertion in allAssertions) {
120        var expectedValue = !!assertions[assertion]
121        if(functionNodeMethods[assertion].invoke(f) !== expectedValue) {
122            throw "Expected " + assertion + " === " + expectedValue + " for " + f;
123        }
124    }
125}
126
127// testFirstFn(script[, assertions...] tests whether all the specified
128// assertions are true in the first function in the given script; "script"
129// is a string with the source text of the script.
130function testFirstFn(script) {
131    arguments[0] = getFirstFunction(compile(script))
132    test.apply(null, arguments)
133}
134
135// ---------------------------------- ACTUAL TESTS START HERE --------------
136
137// The simplest possible functions have no attributes set
138testFirstFn("function f() { }")
139testFirstFn("function f(x) { x }")
140
141// A function referencing a global needs parent scope, and it needs callee
142// (because parent scope is passed through callee)
143testFirstFn("function f() { x }", 'needsCallee', 'needsParentScope')
144
145// A function referencing "arguments" will have to be vararg. It also needs
146// the callee, as it needs to fill out "arguments.callee".
147testFirstFn("function f() { arguments }", 'needsCallee', 'isVarArg')
148
149// A function referencing "arguments" will have to be vararg. If it is
150// strict, it will not have to have a callee, though.
151testFirstFn("function f() {'use strict'; arguments }", 'isVarArg', 'isStrictMode')
152
153// A function defining "arguments" as a parameter will not be vararg.
154testFirstFn("function f(arguments) { arguments }")
155
156// A function defining "arguments" as a nested function will not be vararg.
157testFirstFn("function f() { function arguments() {}; arguments; }")
158
159// A function defining "arguments" as a local variable will be vararg.
160testFirstFn("function f() { var arguments; arguments; }", 'isVarArg', 'needsCallee')
161
162// A self-referencing function defined as a statement doesn't need a self
163// symbol, as it'll rather obtain itself from the parent scope.
164testFirstFn("function f() { f() }", 'needsCallee', 'needsParentScope')
165
166// A self-referencing function defined as an expression needs a self symbol,
167// as it can't obtain itself from the parent scope.
168testFirstFn("(function f() { f() })", 'needsCallee', 'needsSelfSymbol')
169
170// A child function accessing parent's variable triggers the need for scope
171// in parent
172testFirstFn("(function f() { var x; function g() { x } })", 'needsScope')
173
174// A child function accessing parent's parameter triggers the need for scope
175// in parent
176testFirstFn("(function f(x) { function g() { x } })", 'needsScope')
177
178// A child function accessing a global variable triggers the need for parent
179// scope in parent
180testFirstFn("(function f() { function g() { x } })", 'needsParentScope', 'needsCallee')
181
182// A child function redefining a local variable from its parent should not
183// affect the parent function in any way
184testFirstFn("(function f() { var x; function g() { var x; x } })")
185
186// Using "with" unleashes a lot of needs: parent scope, callee, own scope,
187// and all variables in scope. Actually, we could make "with" less wasteful,
188// and only put those variables in scope that it actually references, similar
189// to what nested functions do with variables in their parents.
190testFirstFn("(function f() { var o; with(o) {} })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasWith', 'hasDeepWithOrEval', 'varsInScope')
191
192// Using "eval" is as bad as using "with" with the added requirement of
193// being vararg, 'cause we don't know if eval will be using "arguments".
194testFirstFn("(function f() { eval() })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasEval', 'isVarArg', 'hasDeepWithOrEval', 'varsInScope')
195
196// Nested function using "with" is pretty much the same as the parent
197// function needing with.
198testFirstFn("(function f() { function g() { var o; with(o) {} } })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasDeepWithOrEval', 'varsInScope')
199// Nested function using "eval" is almost the same as parent function using
200// eval, but at least the parent doesn't have to be vararg.
201testFirstFn("(function f() { function g() { eval() } })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasDeepWithOrEval', 'varsInScope')
202
203// Function with 250 named parameters is ordinary
204testFirstFn("function f(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16, p17, p18, p19, p20, p21, p22, p23, p24, p25, p26, p27, p28, p29, p30, p31, p32, p33, p34, p35, p36, p37, p38, p39, p40, p41, p42, p43, p44, p45, p46, p47, p48, p49, p50, p51, p52, p53, p54, p55, p56, p57, p58, p59, p60, p61, p62, p63, p64, p65, p66, p67, p68, p69, p70, p71, p72, p73, p74, p75, p76, p77, p78, p79, p80, p81, p82, p83, p84, p85, p86, p87, p88, p89, p90, p91, p92, p93, p94, p95, p96, p97, p98, p99, p100, p101, p102, p103, p104, p105, p106, p107, p108, p109, p110, p111, p112, p113, p114, p115, p116, p117, p118, p119, p120, p121, p122, p123, p124, p125, p126, p127, p128, p129, p130, p131, p132, p133, p134, p135, p136, p137, p138, p139, p140, p141, p142, p143, p144, p145, p146, p147, p148, p149, p150, p151, p152, p153, p154, p155, p156, p157, p158, p159, p160, p161, p162, p163, p164, p165, p166, p167, p168, p169, p170, p171, p172, p173, p174, p175, p176, p177, p178, p179, p180, p181, p182, p183, p184, p185, p186, p187, p188, p189, p190, p191, p192, p193, p194, p195, p196, p197, p198, p199, p200, p201, p202, p203, p204, p205, p206, p207, p208, p209, p210, p211, p212, p213, p214, p215, p216, p217, p218, p219, p220, p221, p222, p223, p224, p225, p226, p227, p228, p229, p230, p231, p232, p233, p234, p235, p236, p237, p238, p239, p240, p241, p242, p243, p244, p245, p246, p247, p248, p249, p250) { p250 = p249 }")
205
206// Function with 251 named parameters is variable arguments
207testFirstFn("function f(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16, p17, p18, p19, p20, p21, p22, p23, p24, p25, p26, p27, p28, p29, p30, p31, p32, p33, p34, p35, p36, p37, p38, p39, p40, p41, p42, p43, p44, p45, p46, p47, p48, p49, p50, p51, p52, p53, p54, p55, p56, p57, p58, p59, p60, p61, p62, p63, p64, p65, p66, p67, p68, p69, p70, p71, p72, p73, p74, p75, p76, p77, p78, p79, p80, p81, p82, p83, p84, p85, p86, p87, p88, p89, p90, p91, p92, p93, p94, p95, p96, p97, p98, p99, p100, p101, p102, p103, p104, p105, p106, p107, p108, p109, p110, p111, p112, p113, p114, p115, p116, p117, p118, p119, p120, p121, p122, p123, p124, p125, p126, p127, p128, p129, p130, p131, p132, p133, p134, p135, p136, p137, p138, p139, p140, p141, p142, p143, p144, p145, p146, p147, p148, p149, p150, p151, p152, p153, p154, p155, p156, p157, p158, p159, p160, p161, p162, p163, p164, p165, p166, p167, p168, p169, p170, p171, p172, p173, p174, p175, p176, p177, p178, p179, p180, p181, p182, p183, p184, p185, p186, p187, p188, p189, p190, p191, p192, p193, p194, p195, p196, p197, p198, p199, p200, p201, p202, p203, p204, p205, p206, p207, p208, p209, p210, p211, p212, p213, p214, p215, p216, p217, p218, p219, p220, p221, p222, p223, p224, p225, p226, p227, p228, p229, p230, p231, p232, p233, p234, p235, p236, p237, p238, p239, p240, p241, p242, p243, p244, p245, p246, p247, p248, p249, p250, p251) { p250 = p251 }", 'isVarArg')
208